<template>
  <div class="star" :class="starType">
    <span
      v-for="(itemClass,index) in itemClasses"
      :class="itemClass"
      class="star-item"
      :key="index"
    ></span>
  </div>
</template>

<script>
const LENGH = 5
const CLS_ON = 'on'
const CLS_HALF = 'half'
const CLS_OFF = 'off'

export default {
  name: 'HomeStar',
  props: {
    size: {
      type: Number
    },
    score: {
      type: Number
    }
  },
  computed: {
    starType () {
      return 'star-' + this.size
    },
    itemClasses () {
      const result = []
      const score = Math.floor(this.score * 2) / 2
      const hasDecimal = score % 1 !== 0
      const integer = Math.floor(score)
      for (let i = 0; i < integer; i++) {
        result.push(CLS_ON)
      }
      if (hasDecimal) {
        result.push(CLS_HALF)
      }
      while (result.length < LENGH) {
        result.push(CLS_OFF)
      }
      return result
    }
  }
}
</script>

<style lang="stylus" scoped>
  @import "../../assets/styles/mixin.styl"

  .star
    font-size 0
    .star-item
      display inline-block
      background-repeat no-repeat
    &.star-48
      .star-item
        margin-right 22px
        width 20px
        height 20px
        background-size 20px 20px
        &.on
          bg-image('star48_on')
        &.off
          bg-image('star48_off')
        &.half
          bg-image('star48_half')
        &:last-child
          margin: 0
    &.star-36
      .star-item
        width 15px
        height 15px
        margin-right 6px
        background-size 15px 15px
        &:last-child
          margin-right 0
        &.on
          bg-image('star36_on')
        &.half
          bg-image('star36_half')
        &.off
          bg-image('star36_off')
    &.star-24
      .star-item
        width 10px
        height 10px
        margin-right 3px
        background-size 10px 10px
        &:last-child
          margin-right 0
        &.on
          bg-image('star24_on')
        &.half
          bg-image('star24_half')
        &.off
          bg-image('star24_off')
</style>
